Local adaptation and future climate vulnerability in a wild rodent

Silvia Marková, Hayley C. Lanier, Marco A. Escalante, Marcos O. R. Cruz, Michaela Horníková, Mateusz Konczal, Lawrence J. Weider, Jeremy B. Searle and Petr Kotlík ()
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Silvia Marková: Institute of Animal Physiology and Genetics of the Czech Academy of Sciences
Hayley C. Lanier: University of Oklahoma
Marco A. Escalante: Institute of Animal Physiology and Genetics of the Czech Academy of Sciences
Marcos O. R. Cruz: University of Oklahoma
Michaela Horníková: Institute of Animal Physiology and Genetics of the Czech Academy of Sciences
Mateusz Konczal: Adam Mickiewicz University
Lawrence J. Weider: University of Oklahoma
Jeremy B. Searle: Cornell University
Petr Kotlík: Institute of Animal Physiology and Genetics of the Czech Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract As climate change continues, species pushed outside their physiological tolerance limits must adapt or face extinction. When change is rapid, adaptation will largely harness ancestral variation, making the availability and characteristics of that variation of critical importance. Here, we used whole-genome sequencing and genetic-environment association analyses to identify adaptive variation and its significance in the context of future climates in a small Palearctic mammal, the bank vole (Clethrionomys glareolus). We found that peripheral populations of bank vole in Britain are already at the extreme bounds of potential genetic adaptation and may require an influx of adaptive variation in order to respond. Analyses of adaptive loci suggest regional differences in climate variables select for variants that influence patterns of population adaptive resilience, including genes associated with antioxidant defense, and support a pattern of thermal/hypoxic cross-adaptation. Our findings indicate that understanding potential shifts in genomic composition in response to climate change may be key to predicting species’ fate under future climates.

Date: 2023
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DOI: 10.1038/s41467-023-43383-z

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